Tubing scraper for oil wells



Mkch 7, 1939. I c, A. WETTERMARK 9 3 TUBING SCRAPER FOR OIL WELLS Original Filed July 23, 1934 A Weterma r/r Attorney Patenta& Mar. 7, l939 TUBING S Carl A. Wettermark, Dale, Ten., gnor, by masne assignments, to R. W. Fair, Tyle', Ten., and E. A. Kiiewer, Longvlew, Te::.

Application July 23, 1934, Serial No. ?86,617 Benewed September 25, 1936 The present invention relates to an oil well paraflin liquifier for the purpose of cleaning paraifln and other substances that' adhere to the tubing in oil wells and the object of the invention resides in the provision of means oi this na-. ture which may be interposed in the sucker rod.

Another important object oi' the invention resides in the provision of a device of this nature which is exceedingly "simple in its construction, nexpensive to manufacture, durable, thoroughly efilcient ad reliable in use and operation, and otherwise well adapted to the purpose for which it` is designed. p i

In the 'drawing:

Figure 1 is a side elevation of the device embodying the features of my invention, and

Figure 2 is an end' elevation thereof.

Referring to the drawing in detail it will be seen that the numeral 5 denotes a shaft preferably constructed of steel and having reduced threaded ends 6. About the shaft 5 are a pair of spaced fiat annular fianges 1. Each flange 'I has on opposite sides thereof diagonal vents or grooves 8 in their peripheries. The threaded ends 6 should be standard for engagement with the sucker rods. The fianges should have a. diameter about one-eighth of an inch smaller than the diameter of the interior of the tubing. The vents or grooves should be cut at approximately a forty five degree angle to the vertical. These dimenslons are merely given as'examples of practically tried devices of this nature and I do not care to be limited thereto.

The instrument is to `be connected by the .threaded ends 6 into a string of oil well sucker rods 9 so that when all the rods are in the-well the instrument will work about cne hundred feet below the parafln bottom.

It is thought that the construction, operation, utility and advantages of this invention 'will now be quite apparent to those skilled in this art without a more detailed description thereot.

(ci. ist-s) The present embodiment of the invention has been described in considerable detail merely tor, the purposes of exempliflcation since in actual. practice it attains the features of advantage enumerated as desirable in the statement oi" the -5 invention and the above description. v It will be apparent that changes in the details of construction, and in the combination and 'arrangement of parts may be resorted to without departing from the spirit or scope ot the inven- 10 tion as hereinafter claimed or sacriflcing any oi' I its advantages.

Having thus described my invention. what! claim as new is:

1. A device of the class described comprising a 16 shaft having a. stationary annular flange thereon intermediate its ends and providedwith means at the ends thereof whereby it may be connected r and interposed in a string of sucker rodsysaid flange having grooves formed in the periphery 20 thereof, said grooves being on opposite sides of the flange and arranged at approxinate i'orty five degrees to the vertical. I

2. A device ti the class described including a shaft having reduced threaded ends and &pair of* stationary spaced annular flanges intermedi ate its ends, said flanges having grooves formed in the peripheries thereof, the grooves of each flange being on opposite sides thereof and being substantially diagonal to the vertical. I

3. A paraffln cleaner for oil well flow tubing comprising a shaft equipped' with threaded ends adapted for connection between the sections of sucker rods in the well flow tubing, a flat stationary rigid flange rigidly secured to the shalt intermediate its ends and being slightly less in diameter than' the diameter oi' the flow tubing, and the periphery of the flange formed with a.

groove'disposed at an angle with respect to the .axis of the shaft.

cam." A. 

